Drilling-machine.



E. COOK.

DRILLING MACHINE. APPLICATION FILED JUNE 5, 1912.

Patented Sept. 16, 1913.

2 SHEETSSHEET 1.

COLUMBIA PLANOGRAPH CO.|WASHINGTON D C E. COOK.

DRILLING MACHINE.

APPLICATION FILED JUNE 5, 1912.

1 ,O73,21 8, Patented Sept. 16, 1913.

2 SHEETS-SHEET 2.

IIIIIIIIIIII" Q l/IIIIIIIII CDLUMBI A PLANOGRAPH 60., WASHINGTON. D. c.

drilling machines EUGENE cook; or *KALAMAZQQ; anion-roan; ASSJGNDREQ: NATIONAL STANDARD COMPANEQI- or ticnrean, 4 aiconronar on .or .mcniennl Biennium-Macrame.

Specification of Iletters Patent.

PatentedSept.'16;1913.

Application filed June 551912.; Serial No. 701,746.

andgstate of. Michigamhaveinvented cer-.

tain new anduseful Improvements in Drilling-Machines, of, whichQthe following is, a specification; E

This. inventionrelates to improvements in My impro ementsnare p rtic arly eisigned by me for trtackdrills andl'illustrate I and. describethe sarne ;herein .embodieldjin a track drill... Certain features, are, ,h'o'w-. ever, desirablefor use inother relation,s,-.

The. main objects of, this invention are First, to providean iIIlPiOVGCljflfllliligma-. chinein which the drill can be withdrawn from the work without reversing the ,difrec .tionv of its rotation, -that is, without, rotatingthe drillloackward; Secondgto provider in a. drilling rnachine an improved feed; i

mechanism by means of WhicjhEthe-drill may be rapidly advanced, to the ,work or with-' drawn therefrom. Third, to provideIan improved drilling-machine which is capable of very rapid manipulation, and one which is at the same tinie easy, to operate. Fourth,, to provide an improved track drillf whichis simple and economical in structure 1 and at thesa-me time onetwhich is ver y durable and; not. likely toget out oftlepair in use.

Further objects and. objects relating to. structural details, will, definitely appear from, the detailed. description to follow.

I accomplish; the. objects of my invention; by the devices and .meansdescribed in the following specification The. invention is clearly. defined and; pointed out in the claims.

' A structure which-.isa ,preferred embodi-i ment of my invention; .is clearly .,illustrat ed in the accompanying drawing forming a:

part of this specification; m. which 3. 45

Figure I isasideelevation of a structure embodying. the featuresof my invention, the same being. shown in operative relation, the rail beinglshownbydottedlines. Fig II is a detail rear view looking fronitthe right of Fig. 1., Fig. III is a horiz'ontal; 1 section; taken on a line corresponding to the broken: line 3-3 of .Fig. Fig lV ista detail ver; tical longitudinal section taken, on a line corresponding to linez krd of Fig. 1L Fig.

is a detail transverse section taken on a line corresponding to l1ne.5,-5 of Fig. IV. F g VI ;1s a .transversesection. taken one lineflcorresponding .to line 66 of Fig. IV.

Fig. VII is. a detail vertical section on a line corresponding to.line 7-7 of Fig. IV.

In the drawing, similar reference charactersre'fer tosimilar, parts throughout the several'views, and the sectional views are taken looking in the. direction, ,of the little arrows at the ends of thesection lines.

Referring to the drawing thel main or base frame 1 preferably. consists of side haenibersQconnected by suitable cross pieces 3 and. land thehousingbase Which extends betweenthe side members. Theside members .2 project .rearwardlybeyond the cross piece lnnd are connectedto the arms (5 on ,the,transverselbasebar.7,'the armsG being. secured. to the, side members .2 by bolts 8.

The drill holder .or spindlet) is arranged in a horizontal position, the bearing 10 in the base cross pieces .3, t its .rear end :being supported by the feed/nut 11. The feed nut 11 :is arranged in;a bearing 12 in the rear cross piece 4. The .bearing lQ is in-the form offga housing adapted towreceive the feed nut 11,. the .bearing opening, into the housing 5tat its-.forward Qend andmhaving an inturned flange OI, Sl lO11l(lQ1;13x21t its rear ,end for the thrust bearing balls 14;. The feed.

hut is retained in its bearings by means of the set screw 15 which engages an annular groove 16 in the nut- Thedrill, holder-or spindle t). is driven. thronglnthe sprocket wheel lf {which is splined tothe, spindle.

The crankshaft 18 is mounted in suitable bearings-19 and. 20 carried by the upright p.

pr standard .which. preferably. consists of members 21 and 22 which are bolted .to the upwardly projecting ears 23 on theabase. The. cars 23 are vertically slotted .at .24. to receive the bolt .25. crankshaft is provided with .a sprocket wheel 26 which is connected by thesprocket chain 27 to the driving sprocket r17 onthe spindle. The crankQS is arranged on the rear,end of theshaft 18.. Thestandard provided w th a handheld .29v at its upper end, the hand hold being; inthe form of a cross piece located above 1 the crank shaft 18.

The spindle 9 is providedwvith, a chuck 30 On its front. end the torthadrill. The drill holderor spindle 9 is threaded to coact with the feed nut 11, the thread on the spindle being a left hand thread. To drive the feed nut, I provide the sprocket wheel 17 with a gear 31 and the feed nut 11 with a gear 32. Above the spindle and parallel therewith, I arrange a feed shaft 33, the shaft being journaled in bearings 34 and 35 on the front and rear cross pieces 3 and 4 of the base. A gear 36 is splined to the shaft 33 so that it may be shifted into or out of mesh with the. gear 31 on the driving sprocket 17. A gear 37 is fixed to the shaft 33 and arranged in mesh with the gear 32 on the feed nut 11. These gears 31, 32, 36 and 37 are so proportioned that the speed of the feed nut eX- ceeds slightly the speed of the spindle, and the gears are arranged so that the feed nut is driven in the same direction as the spindle. Owing to the feed screw being a left hand screw, the spindle is advanced by this variation in speed.

. The gear. 37 is provided with a collar or sleeve 38 having a groove 39 therein with which the forked end of the shifting lever 40 is engaged. This lever is pivoted at 41 on the housing cap 42. The outer arm 43 of the lever is bent laterally and provided with an operating rod 44 having a hand piece 45 at its upper end arranged so as to be grasped by the hand grasping the hand piece 29 on the upper end of the standard. By an upward pull the gear 36 is shifted into mesh with the driving gear 31. B pushing downward on the rod 44, the lever 43 is actuated to throw the gear 36 out of mesh with the gear 31 and the end of the sleeve 38 into contact with the side of the gear 37. This not only disengages the feed connection for the nut to the driving gear but frictionally holds the nut against rotation. IVith the feed nut held against rotation, the rotation of the spindle to the right or in its cutting direction, owing to the left hand feed screw retracts or withdraws the spindle, so that the spindle is retracted from the work by revolving the crank in the feeding or in the same direct-ion as it is rotated in drilling. To advance the drill to the work, the crank is turned backward so that the spindle is rotated in the reverse direction.

With the parts thus arranged, the machine is operated as follows,The rail engaging hooks 46 are engaged over the rail see Fig. I where the rail is shown in dotted lines. I/Vith the gear 36 out of mesh, the drill is fed up to the rail,that is, to the position shown in Fig. I, by turning the crank 28 backward. The gear 36 is then engaged by pulling up on the rod 44 and the crank rotated in its forward direction. With the gear 36 in mesh, the spindle is automatically 'fed.

When the drilling operation is complete,

the rod 44 is pushed downwardto disengage the gear 36 from the gear 31, stops the feed nut and prevents its rotation. 'Thisjshift ing can be done without stopping the crank shaft, and as soon as the feed nut is stopped the drill is rapidly retracted although it continues to rotate in the forward direction. As soon as the point of the drill is retracted to clearthe head of the rail, the machine may be tilted rearwardly in its base or swung up to disengage the hook 46, and is entirely freed from the rail.

The rotation of the drill in the forward direction while it is being retracted or withdrawn from the work is of decided advantage as it prevents burring of the cutting edges of the drill such as'sometimes results from turning the drill backward while it is in the work and being retracted therefrom.

The fact that it is not necessaryto re verse the rotation of'the crank to retract the drill and that it is withdrawn at full speed of the screw, makes it possible to retraetthe drill from the rail and take the machine from the rail very quickly. The advantage of this not only from the point of being able to accomplish a large amount of work, but also in being able to quickly remove the drill from the rail to accommodate passing trains or cars, is obvious.

The hooks 46 are adjustably mounted on the hook arms 47, the hooks being longitudinally slotted at 48 to receive the securing screws 49. The hook arms 47 are connected at their forward ends by'the cross bar 50. The arms 47 are secured to the frame or base 1 by means of bolts 51 and 52. The arms 47 are provided with vertical slots 5.3 with which the bolts 52 engage sothat the arms may be swung on the bolts 51 to adjust the cording to the height of the rail. By adjustably mounting the hooks upon the hook carrying arms, they may be adjusted according to the size of the rail or to accommodate various conditions found in practice.

'The hooks 46 are independently adjustable so that one may be made longer than the other to meet dliferent conditions such as curves, working around frogs, and the like.

same for raising or lowering the hooks ac- The hooks are spaced a considerable distance apart so that coaeting. with the base, they form a firm support for the'machine when resting upon the rail. 1 I

A housing cap 42 is providedfor the driving gear, the cap being mounted on the base portion of the housing by means of the screw 55. The housing effectively incloses the gears to protect them from dirt and also prevent the gear being injured or broken by careless handling. The housing base 5 is adapted to receive lubricant so that the gears are kept effectively lubricated.

My improved drill is capable ofrvery rapid operation on account of the facility :bodied them. structural details is POSSiblQXWlt-IIQUI; 'jdeparn ing :from my {invention as ,defined by the claim s, but I have met; attempted 5 to illustrate with which it can :be .adjusted :to'i-the work further advantage is ;that ;the drills are met :likely :to bebroken in retracting zfrom the. work and removing :the machine ;therefr,om.1

1 have illustrated and 1 described my i,m-

.provements tin the form in which i1 have-emtGonsiderable variation in or describe such ,variationsgas they will doe readily understood by ;those 1 skilled in the ,artito which ;this invention relates from the disclosure made. i V r :Haymgthus descr bed myiinvention what :I claim {is newandi'desire to-secure' by Let- .ters {Patent 15:

1. In a drilling machine, ithe combination withthe frame comprising a hor zontal portion and ,an upright portion, the horizontal portion being provided with ,a base at its rearend and with downwardly facing rail engaging hooks, at its forward end ,adapted to coact with the base in supporting the frame, the upright "being provided -.with a handheld at its upper end; 921, drill spindle provided with a left hand feediscrew; .a driving wheel having a gear thereon splined to said spindle; a =feed nut having a gear thereon a. shaft-arranged parallel with said spindle; -a gear fixed on said shaft vand meshing withsaidgear on saidnut; a gear .splined -to-said shaft adapted to be shifted into and out ofmesh with saidgear onsaid driving wheel; means for holding said :feed :nut a 'alnst EIQiJELlilOIl when said gear is shifted out. of mesh a shifting-lever for said .gear-andfor; saidmeans a shifting rod provided with a hand piece adapted to be grasped in connection iwith the handheld of the :fraineupright; a crank shaft provided with a crank at its rear end; and driving connections from said.crank shaft to said driving wheel on said spindle.

2. In a drilling machine, the combination with the frame comprising a horizontal portion and an uprightqportion, the horizontal.

portion being provided with a base at its rear end and With downwardly facing rail engaging hooks at its forward end adapted to coact with the base in supporting the frame, the upright being provided with a handheld .at its upper end; a drill spindle provided with a feed screw; a driving wheel having a gear thereon splined to said spindle; a feed. nut having a gear thereon; a shaft arranged parallel with said spindle; a gear fixed on said shaft and meshing with said gear on said nut; a gear splined to said shaft adapted to be shifted into and out of meshwithfsaid gear on said driving "Wheel; :means for holding ,said feed inut iii gamst rotation when said gear is shifted out of mesh; ashifting lever for said gear and for said means; a, shifting rod-provided with: a hand piece adapted i0 be grasped in connection wit-lithe handheld of the frame upright; ;a crank shaft provided with a crank atjits rear end ZIHClClIIVHIg connecgtions ifrornsaid crank shaft to i said driving avheel on said spindle.

, In a drilling machine, the combination iwith theframa of a'drill spindlehaving a left hand feed screw; a driving wheel-having a gear thereon splined to said spindle; a .feedrnut for said feed screwhaving a gear thereon; a shaft arranged parallel with said spindle; a gear ifixed thereon and meshing 1 avith said gear onsaid nut; a gear splined to said shaft and adapted'to be shifted into andout ofmesh withsaidgear on said driving'wheel and provided with a sleeve having-anzannular groove therein; said sleeve being adapted to hold said feednut against rotation when said gear is shifted out of .mesh; and a shifting lever engaging said groove.

4. In a drilling machine,,the combination with the frame comprising a horizontal portion and an upright portion, the horizontal portion being provided witha base at its rearend and with downwardly facing rail engaging hooks at its forward end adapted to coact with the base in supporting the frame, the upright being provided with a handhold at its upper end;a drill spindle provided with a left hand feed screw; a crank shaft; driving connections from said crank shaft to said spindle; a feed nut for said feed screw; driving connections for said feed nut adapted to drive the same in the same direction as the feed screw and at a speed exceeding that of-the .feed screw; means for connecting and disconnecting said feed nut driving connections; and means for automatically locking said feed nut against rotation when its driving connections are disconnected and also including a hand piece adaptedto be grasped in connection with said handhold of the frame.

5. Ina drilling machine, the combination withthe frame comprising a horizontal portion and an upright portion, the horizontal portion being provided with a base at its ,rear end and with downwardly facing rail engaging hooks at its forward end adapted to coact with the base in supporting the frame; a drill spindle provided with a left hand feed screw; a crank shaft; driving connections for said crank shaft to said spindle; a feed nut engaging said feed screw; driving connections for said feed nut adapted to drive the same in the same direction as the feed screw and at a speed exceeding that of the feed screw; and means for connecting and disconnecting said feed nut driving connections including means for tion and an upright portion, the horizontalportion being provided with a base at its rear end and with downwardly facing rail engaging hooks at its forward end adapted to coact with the base in supporting the frame, the upright being provided with a handhold at its upper end; a drill spindle provided with a feedscrew; a crank shaft; driving connections from said crank shaft to said spindle; a feed nut engaging said feed screw; driving connections for said feed nut; and means for connecting and disconnecting said feed nut driving connections including a hand piece adapted to be grasped in connection with said handhold of the frame including means for automatically locking said feed nut when its driving connections are disconnected.

7 In a drilling machine, the combination with the frame provided with a base at'its rear end and with downwardly facing rail engaging hooks at its forward end adapted to coact with the base in supporting the frame; a drill spindle provided with a left hand feed screw; a feed nut engaging said feed screw; a crank shaft provided with a crank at its rear end; driving connections for said crank shaft to said spindle; driving connections for said feed nut adapted to be connected or disconnected, said feed nut being driven in the same direction as said feed screw and at a speed exceeding that of the feed screw; and means for disconnecting the driving connections for said nut without stopping the crank or changing the direction of its rotation, including means for antomatically locking said feed nut when its driving connections are disconnected.

8. In a drilling machine, the combination of the frame; a drill spindle provided with a left hand feed screw; a feed nut for said feed screw having a gear thereon; a driving wheel for said spindle having a gear thereon; a shaft arranged parallel with said spindle; a gear splined to said shaft to be shifted into and out of mesh with said driv- 9. In a drilling machine, .thecombination of the drill spindle having-a left hand feed screw rotating therewith; drilling means for said spindle compr sing agear splined there to; afeed nut for SaldfGGCl screw; driving 1 i connections fro-m'saidgear to said feed nut whereby the feed nut 1s driven at a speed exceedingfa nd 1n the same direction as said feed scre'wfandmeahs for disconnectingthe driving connectionsfor said feed nut, in cluding means for automatically locking said feed nut when its driving connections are disconnected.

10. In a drilling m achine, the combination of the drill spindle havingaleft hand feed screw rotating therewith; driving means-for said'spindle comprising a gear splined thereto; a feed nut for said feed screw; means for driving said feed-nut at a speed exceeding and in the same direction as said feed screw and spindle; and means for stoppingsaid feed nut while said feed screw is rotated by said spindle driving means in its forward direction whereby the drill is retracted while rotating in its forward direction. V

11; In a drilling machine, the combination of the drill spindle having a left hand feed screw rotating therewith; driving means for said spindle and feed screw; a feed nut for said feed screw; means for driving said feed nut at a speed exceeding and in the same direction as said feed screw and spindle; and means'for stopping said feed nut while the feedscrew and spindleare being rotated in their forward direction, whereby the drill is retracted in its forward direction.

In witness whereof, I have hereunto set my hand and seal in the presence .of two witnesses.

EUGENE COOK. [its] Copies of this patent may be obtained for five cents each, by addressing the Commissioner ef Patents,

Washington, D. G. a 

